LancasterThriving_WinterSpring2017 - 13

POWERFUL BACKUP

By itself, the Energy Center of the Future is impressive. A
loss of electricity - even a catastrophic one - would have
little impact on the system's operation, which gets its
power from natural gas. But what happens in the event
of an electrical failure and a leak to the 8-inch gas line,
buried deep within the streets?

LGH's Energy Center of the Future (lower right with
smokestack) had to fit neatly within the complex's footprint
in downtown Lancaster.

The heat from the turbine will then be used to fire a new
heat recovery steam boiler, which in turn creates steam. This
steam will be used by LGH for cooking, humidification, foodprep services, HVAC, sterilization and laundry services. This
single boiler will handle all the hot water needs for the entire
facility, enabling the hospital's remaining three boilers to be
on stand-by.
Finally, additional steam will be used to spin another
turbine. The energy from this turbine will be used to drive
a 1000-ton chiller, providing the hospital with consistent,
42-degree-chilled water for cooling. The new chiller will be
tied into LGH's existing chilled-water loop, consisting of five
additional chillers.

In this scenario, responsibility for powering the hospital
would go to a new pair of two-megawatt backup
generators, fueled by a massive 50,000-gallon tank
of ultra-low sulfur diesel fuel. In conjunction with two
existing 2.1 megawatt generators, power would be
restored to the hospital. These backups have the
capacity to power LGH for four full days. After four days,
LGH would require either a restoration of electricity or
gas, or a refueling of the storage tank.
The change from regular fuel to ultra-low sulfur has
been coming for years and means a big difference
for the environment. With only 15 parts-per-million of
sulfur content, the new fuel is 97 percent cleaner than
standard, highway-use diesel fuel.
The new EPA standards are particularly stringent, and
most facilities making the switch, including LGH, opt to
swap out their existing tanks for new ones, rather than
risk trace amounts of old fuel corrupting the new.
In totality, it's a powerful system, one that will enable
the hospital to operate at full capacity during a loss of
electricity, while saving money along the way. Equally
intriguing, however, is that the structure of the Energy
Center of the Future is quite different than plants with
similar functions.

LancasterChamber.com

13


http://www.LancasterChamber.com

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